无机材料学报 ›› 2022, Vol. 37 ›› Issue (8): 897-902.DOI: 10.15541/jim20210773 CSTR: 32189.14.10.15541/jim20210773

• 研究论文 • 上一篇    下一篇

Ce掺杂SrMgF4超结构多晶体的吸收/光致发光光谱

柳琪(), 朱璨, 谢贵震, 王俊, 张东明, 邵刚勤()   

  1. 武汉理工大学 材料复合新技术国家重点实验室, 武汉 430070
  • 收稿日期:2021-12-17 修回日期:2022-04-07 出版日期:2022-08-20 网络出版日期:2022-04-07
  • 通讯作者: 邵刚勤, 研究员. E-mail: gqshao@whut.edu.cn
  • 作者简介:柳 琪(1993-), 男, 硕士. E-mail: liuqi19930126@163.com

Optical Absorption and Photoluminescence Spectra of Ce-doped SrMgF4 Polycrystalline with Superlattice Structure

LIU Qi(), ZHU Can, XIE Guizhen, WANG Jun, ZHANG Dongming, SHAO Gangqin()   

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
  • Received:2021-12-17 Revised:2022-04-07 Published:2022-08-20 Online:2022-04-07
  • Contact: SHAO Gangqin, professor. E-mail: gqshao@whut.edu.cn
  • About author:LIU Qi (1993-), male, Master. E-mail: liuqi19930126@163.com

摘要:

稀土(RE)离子掺杂的钙钛矿型氟化物是可调谐光学材料的候选材料。本工作通过沉淀法合成了SrMgF4: xCe (x = 0, 0.007, 0.013和0.035)粉末。X射线衍射(XRD)分析表明所获得的荧光粉具有单斜超结构, 价态分析证实存在Ce3+/Ce4+混合价, 在紫外光区通过不同波长的激发光观察到两个荧光带B和C。当Ce3+多面体的对称性从高对称变为低对称时, 源于单斜超结构的晶体场导致能级发生强烈的改变。

关键词: SrMgF4, 铈掺杂, 超结构, 钙钛矿, 光致发光

Abstract:

Rare-earth (RE) ions doped perovskite-related fluorides are candidates for tunable optical materials. In this work, SrMgF4: xCe (x=0, 0.007, 0.013 and 0.035, in mole) powders were synthesized by a precipitation method. X-ray diffraction (XRD) patterns indicate that the obtained phosphors possess monoclinic superstructures. Electrovalence analysis confirms the existence of Ce3+/Ce4+ mixed valence. Two distinct fluorescence bands B and C were observed with different excitation wavelengths in the ultraviolet (UV) light region. Energy levels were modified strongly by the crystal field derived from monoclinic superstructures when the symmetry of Ce3+-polyhedra changed from high- to low- symmetry.

Key words: SrMgF4, Ce-doped, superstructure, perovskite, photoluminescence

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